Scott Wood

**Name of the Vulnerable Software and Affected Versions** FreeBSD versions 5.3 through 5.4 **Description** The issue is related to the Selective Acknowledgement (SACK) in FreeBSD, which does not properly handle an incoming selective acknowledgement when there is insufficient memory. This might allow remote attackers to cause a denial of service, resulting in an infinite loop. **Recommendations** For versions 5.3 and 5.4, consider applying a patch or updating to a newer version that addresses the SACK handling issue to prevent potential denial of service attacks.